Builder motion for spinning frames



BUILDER MOTION FOR SPINNING FRAMES Filed May 31, 1932 INVENTOR.

ATTORNEYS.

Patented Dec. 18, 1934 PATENT OFFIQE BUILDER MOTION FOR SPINNING FRAMES Fred K. liendrickson, Worcester, Mass, assignor to Whitin Machine Works, Whitinsville, Mass, a corporation of Massachusetts Application May 31, 1932, Serial No. 614,361

4Claims. (01.242433) This invention relates to ring frames on which cotton or other textile fibres are spun into yarn. A builder motion is provided in such machines by which the shape of the full bobbin is determined and particularly the taper of the winding at the tip of the bobbin.

A demand has recently developed for longer bobbins wound to increased diameter, in order to increase the length of yarn on each bobbin and to correspondingly reduce the number of knots to be tied in subsequent operations.

When these larger bobbins are wound, it has been found necessary to preserve the same angle of taper at the tip of the bobbin, as any increase in the sharpness of the taper causes the yarn to slough air in bunches. Consequently the builder motion requires a substantially greater range of adjustment, so that the shortening of the traverse may be continued during the longer winding operation.

In a common commercial type of builder motion, the shortening of the traverse is produced by means of a rack and worm gear, and it has been proposed to obtain the increased adjustment by lengthening the adjusting rack. It is found, however, that the rack cannot be lengthened sufficiently without causing the rack to engage definitely located parts of the spinning frame, such as the spindle rail in one direction and the main cylinder shaft or bearing in the opposite direction.

It is the object of my present invention to provide a novel construction in a builder motion by which a largely increased traverse adjustment may be obtained, while avoiding interference with other parts of the spinning frame.

More specifically, my invention relates to the provision of a duplex worm drive for a single and relatively short segmental rack bar by which the traverse is adjusted. My invention further relates to arrangements and combinations of parts which will be hereinafter described and more particularly pointed out in the appended claims.

A preferred form of the invention is shown in the drawing, in which Fig. 1 is a front elevation of parts of a ring spinning frame embodying my improvements;

Fig. 2 is a sectional side elevation, taken along 50 the line 2-2 in Fig. 1; and

Fig. 3 is a side elevation of a bobbin illustrating the increased winding.

Referring to Figs. 1 and 2, I have shown portions of a ring spinning frame including an end frame 10, a spindle rail 11, a ring rail 12 mounted on lifter rods 13, a plurality of spindles S and a plurality of spinning rings R.

The lifter rods 13 are supported on rolls 14 on lifter levers 15 pivoted on brackets 16 and counterweighted at 17. An upwardly extending arm 18 is provided with a segmental end portion 19 to which an actuating chain 20 is connected. The chain 20 passes over a fixed guide pulley 21 and at its lower end is connected to the builder lever to be described.

The spindles S are driven by bands 22 from the usual driving cylinder 23 mounted on a main drive shaft 24. A builder lever is pivoted at 31 on the end frame 10 and is provided with a roll 32 engaged by a heart cam 33, pivoted at 34 on the end frame 10 and continuously rotated through suitable gearing, one element of which is indicated at 35 in Fig. 1.

All of the parts thus far described are of the usual commercial form and in themselves form no part of my present invention except as the builder lever 30 has been modified to receive my improved traverse-adjusting mechanism which I will now describe.

The builder lever 30 is provided with segmental guideways (Fig. 2) adapted to receive a short segmental rack 41 having an opening 42 at one end to receive a hook 43 on the end of the chain 20 by which the lifter levers 15 are operated. The rack 41 has a lug or projection 44 at one end, adapted to engage a stop plate 45 fixed on the lever 30 and limiting outward movement of the rack.

A worm shaft is mounted in bearings in the builder lever 30 and is provided with a ratchet wheel 51 and with duplex worms 52 and 53 positioned to engage the segmental rack 41. The usual pawl feed mechanism is provided for the ratchet wheel 51, so that the worm shaft 50 is advanced angularly a definite amount for each rotation of the heart cam 33 and each oscillation of the builder lever 30.

At the beginning of the winding of a bobbin, the rack 41 is set in the position indicated in Fig. 2, the teeth of the rack bar being then engaged by the Worm 52. In this position, the chain 20 is given the greatest amount of motion and consequently the desired long traverse of yarn on the bare bobbin is effected. As the winding increases, the worm 52 gradually moves the rack 41 toward the right in Fig. 2, shortening the distance between the opening 42 and the builder lever pivot 31, and consequently gradually reducing the traverse of the yarn on the bobbin.

The operation continues until the outer end of the rack 41 reaches the worm 52, at which time the worm 53 engages the inner end of the rack 41 and thereafter continues the gradual adjustment of the rack 41 toward the right, thus gradually shortening the traverse and causing the yarn to build up at a predetermined gradual taper, such as is indicated in Fig. 3. The shaded portions indicate the additional amount of yarn which is now wound on the longer bobbins.

From Fig. 3 it will be clear that the length of taper, which has previously corresponded to the distance between the points aand b, must now correspond to the distance between the points a and c. This increased lengthef taper is pro-' duced in my improved builder motion by the 'suc cessive operation of the two worms 52 and 53, without increasing the length of therack 41 and thus causing the rack to engage the spindle rail 11 at one end orthe main cylinder shaft 24 or its" bearing at the other end. Consequently I am able to readily adapt commercial spinning frames to the winding of bobbins of increased length and diameter, by the simple provision or substitution of a builder lever modified to utilize a relatively short rackand duplex worms successively engaging the short rack. I am also able to obtain the increased traverse adjustment without discarding the old and wellknown worm and rack adjustment, which has been found extremely satisfactory in .use. The old construction is fully shown and described in Goldsmith Patent No. 1,136,417 of April 20, 1915. Having thus described my invention and the advantages thereof, I do not wish to be limited to the details herein disclosed, otherwise than as set forth in the claims, but what I claim is:--

1. In a builder motion for a ring spinning frame, a builder lever having guideways thereon, a member slidable in said guideways and connected to traverse the ring rail, means to engage and move said member relative to said lever, and additional means to engage and further move said member after a predetermined initial movement thereof by said first means.

2 In a builder motion for a ring spinning frame, 'a builder lever having guideways thereon, a rack slidable in said guideways and connected to traverse the ring rail, a worm shaft intermittently advanced, and spaced worm portions on said worm shaft, successively engaging said rack and successively effective to decrease the traverse of the ring rail.

3. In a builder motion for a ring spinning frame, a builder lever having guideways thereon, a rack slidable in said guideways and connected to traverse the ring rail, a worm shaft intermittently advanced, and spaced worms on said worm shaft successively engaging said rack and successively effective to decrease the traverse of the ring rail, the second worm engaging the inner end of the rack just before the outer end of the rack passes out of engagement with the first worm.

4. In a builder motion for a ring spinning frame, a builder lever having segmental guideways thereon, a segmental rack slidable in said guideways and connected to traverse the ring rail, a worm shaft intermittently advanced, and a pair of worms spaced apart on said worm shaft and successively engaging said rack and successively eifective to move the rack and decrease the traverse of the ring rail.

FRED K. HENDRICKSON 

